PDF malware analysis — malicious · a9a16f0269d14ed7

MALICIOUS

PDF

14.6 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 2104edd027dd52787b6e2c4db0184813 SHA-1: 4f847d50c0c42c0bb42845eabc7270faa00e4f9c SHA-256: a9a16f0269d14ed7732d04ef519c34ecf16d1fed6e02d24a3c60a62e4b83037d

210 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF contains embedded JavaScript with multiple eval() calls, a common technique for obfuscating malicious code. Heuristics indicate the presence of JavaScript actions and embedded JS streams, with ML and ClamAV flagging it as malicious (Pdf.Exploit.Agent-36118). The script's eval() calls are used to construct and execute code, strongly suggesting it's designed to download and execute a second-stage payload. The extracted artifact names also point to JavaScript.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-36118 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36118
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `076d60b27f749b27651b04f3e32fe5a4dac1e25e57c52d0055e21a6c9a993ce4`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13345 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 14 long base64-like blob(s).
`javascript_obj0013_001.js` `7223f502656e3ddbd68262bc47f0ac9430b1dae9d117d575a38f110cec1cf6a5`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	14051 bytes
Detection ClamAV: Pdf.Exploit.Agent-36118 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 14 long base64-like blob(s).

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